CN109157970A - The tail gas of a kind of pair of vinyl-chloride-containing carries out the device of reclaiming clean - Google Patents
The tail gas of a kind of pair of vinyl-chloride-containing carries out the device of reclaiming clean Download PDFInfo
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- CN109157970A CN109157970A CN201811324993.2A CN201811324993A CN109157970A CN 109157970 A CN109157970 A CN 109157970A CN 201811324993 A CN201811324993 A CN 201811324993A CN 109157970 A CN109157970 A CN 109157970A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses the devices that the tail gas of a kind of pair of vinyl-chloride-containing carries out reclaiming clean, it include: gas-liquid separator, oxygen analyzer and controller, the controller connects the oxygen analyzer, the first valve and the second valve, for monitoring the data of the oxygen analyzer detection, first valve and the second valve ON/OFF are controlled；When the data of oxygen analyzer detection are less than predetermined threshold, controller opens the first valve, closes the second valve；When the data of oxygen analyzer detection are not less than predetermined threshold, controller opens the second valve, closes the first valve.Controller is by oxygen analyzer and the first valve and the accurate interlocked control of the second valve in the present invention, realize efficiently separating for oxygen content acceptable gas and the unqualified gas of oxygen content, to promote the recycling of oxygen content acceptable gas, production cost is saved for enterprise, environmental pollution is reduced to emptying after the unqualified gas treatment of oxygen content using caustic wash unit simultaneously.
Description
Technical field
The invention belongs to the disposal of three wastes and technical field of comprehensive utilization, polymerize more particularly, to a kind of pair of PVC production
The tail gas of the vinyl-chloride-containing generated in journey carries out the device of reclaiming clean.
Background technique
In polyvinyl chloride (PVC) normally production polymerization process, vinyl chloride (VCM) gradually decreases in polymeric kettle,
It is converted into solid PVC, but still has the unreacted VCM gas in part to need to recycle.VCM recycling is divided into interval recycling and continuous recycling
Two parts, interval recycling and the VCM monomer continuously recycled pass through interruption compressor respectively and continuous compressor is compressed to condensation pressure
After power, condensed into VCM first-stage condenser.
After the condensation of VCM first-stage condenser, uncooled gas is further condensed through VCM secondary condenser again, VCM B-grade condensation
The uncooled gas of device enters tail gas adsorption device (active carbon adsorption), through centrifugal drying after remaining VCM in absorption tail gas
The discharge of unit discharge drum.
That is, the VCM contained in the uncooled gas of VCM secondary condenser is not utilized, also, tail gas adsorption device pair
The degree of purification of tail gas is not high, still can residual fraction VCM, the problem of not being fully solved environmental pollution.In addition, tail gas adsorption device
In active carbon desorption need to heat regeneration, operating cost is higher.
Summary of the invention
The object of the present invention is to provide the devices that the tail gas of a kind of pair of vinyl-chloride-containing carries out reclaiming clean, produce to PVC poly-
The tail gas that VCM secondary condenser exports during conjunction is recycled, to solve the recycling benefit to vinyl chloride in the prior art
With rate is low and the high problem of tail gas adsorption device operating cost.
To achieve the above object, the present invention adopts the following technical scheme:
The tail gas that the present invention provides a kind of pair of vinyl-chloride-containing carries out the device of reclaiming clean, comprising: gas-liquid separator, oxygen
Analyzer and controller, the gas-liquid separator is used to receive the tail gas of vinyl-chloride-containing, and carries out gas-liquid to the tail gas of vinyl-chloride-containing
Separation, obtains primary gas and waste liquid, the waste liquid is discharged to wastewater treatment by the liquid outlet conduit of the gas-liquid separator
System；The oxygen analyzer is mounted on the gases exit line of the gas-liquid separator, for detecting the primary gas
Oxygen content, when the oxygen content of primary gas is less than predetermined threshold, the as gas of oxygen content qualification, when the oxygen of primary gas contains
When amount is not less than predetermined threshold, the as underproof gas of oxygen content；The gases exit line respectively with first pipe and
Two pipelines connect, and are provided with the first valve in first pipe, the second valve are provided on second pipe, the first pipe is used for
Oxygen content acceptable gas is imported into vinyl chloride gas holder water seal preceding pipeline, to recycle vinyl chloride, the second pipe is used for will
The unqualified gas of oxygen content is discharged into the processing of caustic wash unit water sealed tank；The controller connect the oxygen analyzer, the first valve and
Second valve controls first valve and the second valve ON/OFF for monitoring the data of the oxygen analyzer detection；Work as institute
When stating the data of oxygen analyzer detection less than predetermined threshold, controller opens the first valve, closes the second valve；When the oxygen
When the data of analyzer detection are not less than predetermined threshold, controller opens the second valve, closes the first valve.
Preferably, the predetermined threshold of the oxygen analyzer is 5%.
Preferably, imported valve is provided on the inlet pipeline of the gas-liquid separator, the imported valve is by the control
Device control processed.
Preferably, check-valves is provided on the inlet pipeline of the gas-liquid separator, the check-valves is described for preventing
Tail gas adverse current in inlet pipeline.
Preferably, it is provided with showering guilding valve and spectactle blind on the inlet pipeline of the gas-liquid separator, is used for inspection operation
And it is effectively isolated with other systems.
Preferably, the inlet pipeline of the gas-liquid separator has certain gradient, and the gas-liquid separator is in minimum
Point, so that the liquid in inlet pipeline all automatically flows into gas-liquid separator.
Preferably, the Liquid level in the gas-liquid separator in the gas-liquid separator height 80% or less.
Preferably, the gas-liquid separator is provided with high report interlock, for detecting the liquid in the gas-liquid separator
Position height, when the liquid level in the gas-liquid separator is higher than 80%, height report interlock can issue alarm signal, and will be described
Alarm signal passes to the controller, and the controller closes imported valve according to the alarm signal received.
Preferably, visor is provided on the liquid outlet conduit of the gas-liquid separator, the visor can be used for seeing clearly institute
State the medium state in liquid outlet conduit.
Compared with prior art, the tail gas of a kind of pair of vinyl-chloride-containing provided by the invention carries out the device of reclaiming clean, tool
Have following advantage: oxygen analyzer and the first valve and the accurate interlocked control of the second valve are realized oxygen content qualification gas by controller
Body and the unqualified gas of oxygen content efficiently separate, make originally the exhaust gas containing VCM further utilized, to promote VCM
The recycling of gas saves production cost for enterprise, while using caustic wash unit to the unqualified gas treatment heel row of oxygen content
Sky reduces environmental pollution.Compared with simple tail gas adsorption device, operating cost is reduced.
The control structure that the device can be combined using local operation and middle control DCS, is contained with accurate gas-liquid separation, oxygen
Amount detection and interlocked control are control core, complete whole device efficiently separating and being recycled to the tail gas of vinyl-chloride-containing；
The device does not need complicated mechanical equipment, and low energy consumption, easy to operate, and energy save the cost reduces environmental pollution, therefore has
Broad application prospect.
Detailed description of the invention
Fig. 1 is that the tail gas of a kind of pair of vinyl-chloride-containing provided by the invention carries out the structure drawing of device of reclaiming clean.
Fig. 2 is to carry out reclaiming clean to the tail gas generated in two kinds of polymerization processes of EPVC and SPVC in the present embodiment
Structural schematic diagram.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, and reference label refers to the group in the present invention
Part, technology, realizing under appropriate circumstances so as to advantages and features of the invention can be easier to be understood.Following description is pair
The materialization of the claims in the present invention, and other specific implementations not clearly stated relevant to claim also belong to power
The range that benefit requires.The present invention will be described in detail combined with specific embodiments below.
The tail gas that Fig. 1 shows a kind of pair of vinyl-chloride-containing provided by the invention carries out the structure drawing of device of reclaiming clean.
As shown in Figure 1, the tail gas of a kind of pair of vinyl-chloride-containing carries out the device of reclaiming clean, comprising: gas-liquid separator 1, oxygen
Analyzer 2 and controller 3, gas-liquid separator 1 is used to receive the tail gas of vinyl-chloride-containing, and carries out gas-liquid to the tail gas of vinyl-chloride-containing
Separation, obtains primary gas and waste liquid, and waste liquid is discharged to waste water treatment system by the liquid outlet conduit 11 of gas-liquid separator 1；
Oxygen analyzer 2 is mounted on the gases exit line 12 of gas-liquid separator 1, for detecting the oxygen content of the primary gas, when
When the oxygen content of primary gas is less than predetermined threshold, as oxygen content acceptable gas, when the oxygen content of primary gas is not less than pre-
When determining threshold value, the as unqualified gas of oxygen content.
Gases exit line 12 is connect with first pipe 13 and second pipe 14 respectively, is provided with first in first pipe 13
Valve 41, the second valve 42 is provided on second pipe 14, and first pipe 13 is used to oxygen content acceptable gas importing vinyl chloride
Gas holder water seal preceding pipeline, to recycle vinyl chloride, second pipe 14 is used to the unqualified gas of oxygen content being discharged into caustic wash unit
Water sealed tank processing.
Controller 3 connects oxygen analyzer 2, the first valve 41 and the second valve 42, for monitoring the number of the detection of oxygen analyzer 2
According to the first valve 41 of control and 42 ON/OFF of the second valve；
When the data that oxygen analyzer 2 detects are less than predetermined threshold, controller 3 opens the first valve 41, closes the second valve
Door 42；When the data that oxygen analyzer 2 detects are not less than predetermined threshold, controller 3 opens the second valve 42, closes the first valve
41。
In the present invention, the tail of the tail gas of vinyl-chloride-containing VCM secondary condenser outlet in PVC production polymerization process
Gas contains a small amount of vinyl chloride, inert gas, nitrogen, carbon dioxide, oxygen and waste liquid of condensation etc. in tail gas.The device is to this
Portion gas carries out the oxygen content of detection primary gas after gas-liquid separation, and primary gas is divided into oxygen according to the difference of oxygen content and is contained
Measure acceptable gas and the unqualified gas of oxygen content.
After gas-liquid separator 1 carries out gas-liquid separation to the tail gas of vinyl-chloride-containing, the waste liquid of generation passes through gas-liquid separator 1
Liquid outlet conduit 11 is discharged to waste water treatment system, and valve 44 is provided on liquid outlet conduit 11, for controlling the stream of waste liquid
Out.Meanwhile liquid outlet conduit 11 has certain gradient, enables waste liquid smoothly from inflow waste water treatment system.It is referred to herein
Waste water treatment system be mercury-containing waste water processing unit, waste liquid recycles after mercury-containing waste water processing unit is further processed.
Method provided by the invention, wherein the predetermined threshold of oxygen analyzer 2 is 5%.That is, when primary gas
When oxygen content is less than 5%, as oxygen content acceptable gas, when the oxygen content of primary gas is not less than 5%, as oxygen content is not
Acceptable gas.Before oxygen content acceptable gas imports the water seal of vinyl chloride gas holder by first pipe 13, then again by vinyl chloride monomer
It is sent into polymerized unit, to recycle this part vinyl chloride.When oxygen content is more than 5% in vinyl chloride, hair is easy in gas holder
Raw explosion, is unfavorable for keeping the safety in production, it is therefore desirable to which oxygen content is 5% as critical by the oxygen content in strict control vinyl chloride
Point.
The unqualified gas of oxygen content is discharged into caustic wash unit water sealed tank by second pipe 14, and caustic wash unit water sealed tank absorbs oxygen
After vinyl chloride in the unqualified gas of content, it is discharged through centrifugal drying unit discharge drum, the tail gas of discharge is pollution-free.
Method provided by the invention, wherein be provided with imported valve 43, import on the inlet pipeline 15 of gas-liquid separator 1
The control of the also controlled device 3 of valve 43.
Method provided by the invention, wherein be provided with check-valves 44, check-valves on the inlet pipeline 15 of gas-liquid separator 1
44 for preventing the tail gas adverse current in inlet pipeline 15.
Method provided by the invention, wherein be provided with showering guilding valve 5 on the inlet pipeline 15 of gas-liquid separator 1 and eight words are blind
Plate 6 is effectively isolated for inspection operation and with other systems.In the present invention, installation showering guilding valve 5, which is used as, after check-valves 44 is set
Mouth is changed, interim pipeline is accessed when to overhaul.After showering guilding valve 5 install spectactle blind 6 be used as isolating device, when to overhaul with
Other systems are effectively isolated.
Spectactle blind 6 is a kind of pipeline appliance, is usually used in needing to change the pipeline flange of process, material mainly have carbon steel,
Stainless steel, alloy can be selected according to loine pressure grade and pipeline medium.It is generally used on the biggish pipeline of caliber,
It is usually unimpeded with flange one end occupancy spacing holding tube line, the blind plate of other end condition of equivalent thickness is changed to when needing so that pipeline is truncated.
It avoids influencing whole system because pipeline is forced to expand caused by temporarily replacing other blind plates.
Method provided by the invention, wherein the inlet pipeline 15 of gas-liquid separator 1 has certain gradient, gas-liquid separation
Device 1 is in minimum point, so that the liquid in inlet pipeline 15 all automatically flows into gas-liquid separator 1.The device is by by gas-liquid
Separator 1 is set to minimum point, so that the liquid in inlet pipeline 15 all automatically flows into gas-liquid separator 1, it is therefore prevented that waste liquid
The case where delay, occurs.
Method provided by the invention, wherein the Liquid level in gas-liquid separator 1 is the 80% of 1 height of gas-liquid separator
Hereinafter, to promote efficiently separating for gas-liquid.
Method provided by the invention, wherein gas-liquid separator 1 is provided with high report interlock 7, for detecting gas-liquid separation
Liquid level in device 1, when the liquid level in gas-liquid separator 1 is higher than 80%, height report interlock 7 can issue alarm signal,
And the alarm signal is passed into controller 3, controller 3 closes imported valve 43 according to the alarm signal received.
Method provided by the invention, wherein visor 8, visor 8 are provided on the liquid outlet conduit 11 of gas-liquid separator 1
It can be used for seeing clearly the medium state in liquid outlet conduit 11.Visor category safety attachment is divided into round and rectangle by shape and regards
Mirror.
The present invention is described in detail combined with specific embodiments below.
It is net Fig. 2 shows recycle to the tail gas generated in two kinds of polymerization processes of SPVC and EPVC in the present embodiment
The structural schematic diagram of change.
As shown in Fig. 2, in the present embodiment, while the tail gas generated in two kinds of polymerization processes of SPVC and EPVC is carried out
Reclaiming clean.The tail gas content of SPVC and EPVC secondary condenser outlet is as shown in table 1.Wherein, SPVC secondary condenser exports
Tail gas be 57.1kg/h；The tail gas of EPVC secondary condenser outlet is 56kg/h.
The exhaust gas composition and content of table 1:SPVC and EPVC secondary condenser outlet
In the present embodiment, original system is that the tail gas from SPVC and EPVC secondary condenser outlet line passes through life respectively
It produces original pipeline and enters tail gas adsorption device.
According to device provided by the invention, it is net to increase a set of tail gas recycle in SPVC and EPVC secondary condenser outlet line
The system of change, including 1, oxygen analyzer 2 of a gas-liquid separator and controller 3 and matched pipeline (11~15), valve
(41~44), showering guilding valve 5, spectactle blind 6, high report interlocking 7 and visor 8 etc., due to there is two outlet lines of SPVC and EPVC, because
Imported valve 43, check-valves 44, showering guilding valve 5 and spectactle blind 6 respectively setting two on the inlet pipeline 13 of this gas-liquid separator 1
Set.
Wherein, controller 3 is distributed monitoring control system, and distributed monitoring control system is based on microprocessor, using collection
The mode of middle monitoring, decentralised control, according to the data that oxygen analyzer 2 detects, control the opening of the first valve 41 and the second valve 42/
It closes, realization efficiently separates oxygen content acceptable gas and the unqualified gas of oxygen content, to promote oxygen content acceptable gas
It recycles, saves production cost for enterprise, while reducing to emptying after the unqualified gas treatment of oxygen content using caustic wash unit
Environmental pollution.
Two kinds of control models are remotely controlled using local operation and middle control DCS in the present embodiment, are described as follows:
Local operation: local operation, that is, manual mode for rigging up and debugging, normal service and Breakdown Maintenance and gives up
The discharge etc. of liquid.
Middle control DCS is remotely controlled: middle control DCS remotely controls i.e. automated manner, and middle control personnel can be remote by middle control DCS system
Journey accurately controls the numerical value and control the first valve, the second valve of the liquid level of liquid in gas-liquid separator, monitoring oxygen analyzer detection
Situations such as switch of door, the operation of equipment is operated by middle control personnel completely, and Field Force only cooperates discharge and inspection of waste liquid etc.
Operation.
Variation
First pipe 13 is arranged to tail gas (the oxygen content qualification gas with certain gradient, after the separation of gas-liquid separator 1
Body) during entering before the water seal of vinyl chloride gas holder, a small amount of liquid carried in tail gas can be flow backwards into gas-liquid separator 1,
Gas-liquid separation is further realized, the degree of purity of oxygen content acceptable gas is improved.
Second pipe 14 is similarly arranged to the tail gas (oxygen content with certain gradient, after the separation of gas-liquid separator 1
Unqualified gas) during entering before caustic wash unit water sealed tank, a small amount of liquid carried in tail gas can be flow backwards into gas-liquid
Separator 1, further realizes gas-liquid separation, reduces caustic wash unit to the treating capacity of tail gas.
Compared with prior art, the tail gas of a kind of pair of vinyl-chloride-containing provided by the invention carries out the device of reclaiming clean, tool
Have following advantage: oxygen analyzer and the first valve and the accurate interlocked control of the second valve are realized oxygen content qualification gas by controller
Body and the unqualified gas of oxygen content efficiently separate, to promote the recycling of oxygen content acceptable gas, save life for enterprise
Cost is produced, while environmental pollution is reduced to emptying after the unqualified gas treatment of oxygen content using caustic wash unit.With simple tail
Aspiration adsorption device is compared, and operating cost is reduced.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and this
Field technical staff can be designed alternative embodiment without departing from the scope of the appended claims.In claim
In, any reference symbol between parentheses should not be configured to limitations on claims.
Claims (9)
1. the device that the tail gas of a kind of pair of vinyl-chloride-containing carries out reclaiming clean, comprising: gas-liquid separator (1), oxygen analyzer (2) and
Controller (3),
The gas-liquid separator (1) is used to receive the tail gas of vinyl-chloride-containing, and carries out gas-liquid separation to the tail gas of vinyl-chloride-containing, obtains
To primary gas and waste liquid, the waste liquid is discharged to wastewater treatment by the liquid outlet conduit (11) of the gas-liquid separator (1)
System；
The oxygen analyzer (2) is mounted on the gases exit line (12) of the gas-liquid separator (1), described first for detecting
The oxygen content of grade gas, when the oxygen content of primary gas is less than predetermined threshold, as oxygen content acceptable gas works as primary gas
Oxygen content when being not less than predetermined threshold, the as unqualified gas of oxygen content；
The gases exit line (12) connect with first pipe (13) and second pipe (14) respectively, and first pipe is set on (13)
It is equipped with the first valve (41), is provided on second pipe (14) the second valve (42), the first pipe (13) is for containing oxygen
It measures acceptable gas and imports vinyl chloride gas holder water seal preceding pipeline, to recycle vinyl chloride, the second pipe (14) is used for oxygen
The unqualified gas of content is discharged into the processing of caustic wash unit water sealed tank；
The controller (3) connects the oxygen analyzer (2), the first valve (41) and the second valve (42), described for monitoring
The data of oxygen analyzer (2) detection, control first valve (41) and the second valve (42) ON/OFF；
When the data of the oxygen analyzer (2) detection are less than predetermined threshold, controller (3) opens the first valve (41), closes
Second valve (42)；When the data of the oxygen analyzer (2) detection are not less than predetermined threshold, controller (3) opens the second valve
Door (42) is closed the first valve (41).
2. the apparatus according to claim 1, wherein the predetermined threshold of the oxygen analyzer (2) is 5%.
3. the apparatus according to claim 1, wherein on the inlet pipeline of the gas-liquid separator (1) (15) be provided with into
Mouth valve (43), the imported valve (43) are controlled by the controller (3).
4. device according to claim 3, wherein be provided with only on the inlet pipeline (15) of the gas-liquid separator (1)
It returns valve (44), the check-valves (44) is used to prevent the tail gas adverse current in the inlet pipeline (15).
5. device according to claim 4, wherein be provided with and lead on the inlet pipeline (15) of the gas-liquid separator (1)
Valve (5) and spectactle blind (6) are drenched, is effectively isolated for inspection operation and with other systems.
6. the apparatus according to claim 1, wherein the inlet pipeline (15) of the gas-liquid separator (1) has certain
The gradient, the gas-liquid separator (1) is in minimum point, so that the liquid in inlet pipeline (15) all automatically flows into gas-liquid separator
(1) in.
7. device according to claim 6, wherein the Liquid level in the gas-liquid separator (1) is in the gas-liquid point
From the 80% or less of device (1) height.
8. device according to claim 7, wherein the gas-liquid separator (1) is provided with high report interlock (7), uses
Liquid level in the detection gas-liquid separator (1) is high when the liquid level in the gas-liquid separator (1) is higher than 80%
Report interlock (7) can issue alarm signal, and the alarm signal be passed to the controller (3), the controller (3)
According to the alarm signal received, imported valve (43) are closed.
9. device according to claim 7, wherein be arranged on the liquid outlet conduit (11) of the gas-liquid separator (1)
Have visor (8), the visor (8) can be used for seeing clearly the medium state in the liquid outlet conduit (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811324993.2A CN109157970A (en) | 2018-11-08 | 2018-11-08 | The tail gas of a kind of pair of vinyl-chloride-containing carries out the device of reclaiming clean |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811324993.2A CN109157970A (en) | 2018-11-08 | 2018-11-08 | The tail gas of a kind of pair of vinyl-chloride-containing carries out the device of reclaiming clean |
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| CN109157970A true CN109157970A (en) | 2019-01-08 |
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| CN201811324993.2A Pending CN109157970A (en) | 2018-11-08 | 2018-11-08 | The tail gas of a kind of pair of vinyl-chloride-containing carries out the device of reclaiming clean |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112225943A (en) * | 2020-09-21 | 2021-01-15 | 内蒙古中谷矿业有限责任公司 | Monomer alkali washing refining device is retrieved in polymerization |
| CN112303627A (en) * | 2019-08-02 | 2021-02-02 | 中国石油化工股份有限公司 | Gas distribution system and method |
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| CN103285796A (en) * | 2012-03-01 | 2013-09-11 | 天辰化工有限公司 | Closed-loop circulating and recycling method for polymerization tail gas in polyvinyl chloride production |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112303627A (en) * | 2019-08-02 | 2021-02-02 | 中国石油化工股份有限公司 | Gas distribution system and method |
| CN112303627B (en) * | 2019-08-02 | 2023-02-17 | 中国石油化工股份有限公司 | Gas distribution system and method |
| CN112225943A (en) * | 2020-09-21 | 2021-01-15 | 内蒙古中谷矿业有限责任公司 | Monomer alkali washing refining device is retrieved in polymerization |
| CN112225943B (en) * | 2020-09-21 | 2021-10-15 | 内蒙古中谷矿业有限责任公司 | Monomer alkali washing refining device is retrieved in polymerization |
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Application publication date: 20190108 |
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